Re: 1952 Evinrude Lightwin 3hp (Carb adjustment)

[jerry-ahrens]

For proper adjustment of the mixture screws, you should adjust the high speed (bottom) needle first. Run the engine full throttle on the boat, turn the high speed needle slowly closed till the motor bogs down, then open it slowly till the engine speeds up and runs smooth. NOW, you can do the same with the low speed needle… when you slowly close the needle, the motor will actually idle up a bit when you get to the point of being to lean. Then, open the needle slightly till you have a smooth idle. if you have good compression, your motor will idle all the way down to the ”slow” range.